Secret Agent X: The Torture Trust, by Brant House (epub/Kindle)
Secret Agent "X" - master of disguise - faces off against a trio of ruthless inventors determined to win a fortune through blackmail. For anyone who dares to defy them dies a hideous death from burning acid! The Torture Trust is the first Secret Agent "X" novel, originally published in the February 1934 issue of Secret Agent "X" magazine.